Krishna offers one of the Gita's most striking analogies. When an entire region is flooded with water, what use does anyone have for a small well? The well still exists, the water in it is still real — but the person standing in a flood has no need to go looking for it. In the same way, for a person who has realized Brahman — the ultimate reality — the Vedas still exist and are still true, but they no longer serve as the primary source. The knower carries the essence within.
This is not a dismissal of the Vedas. It is a statement about what happens when their purpose is fulfilled. The Vedas are a path. They teach, guide, prescribe, and illuminate. But when a person arrives at the destination — direct knowledge of Brahman — the path has done its work. A ladder is essential for climbing, but once you are on the roof, you do not carry the ladder on your shoulders.
The word 'vijanatah' — one who truly knows — is important. This is not book knowledge or second-hand understanding. This is direct, personal realization. Only at that level does the analogy apply. For everyone else, the Vedas remain indispensable guides.